/Engine/Source/Runtime/MeshConversion/Public/DynamicMeshToMeshDescription.h
Update existing MeshDescription based on DynamicMesh. Assumes mesh topology has not changed. Copies positions optionally, normals, tangents and UVs
void Update ( const [FDynamicMesh3](API\Runtime\GeometryCore\DynamicMesh\FDynamicMesh3) * MeshIn, [FMeshDescription](API\Runtime\MeshDescription\FMeshDescription) & MeshOut, bool bUpdateNormals, bool bUpdateTangents, bool bUpdateUVs )